Moisture effect on fluidization behavior of loblolly pine Wood grinds

Olatunde, Gbenga; Fasina, Oladiran; McDonald, Timothy P.; Adhikari, Sushil; Duke, Steve R.

doi:10.1007/s13399-016-0223-9

Cited by 10 publications

(10 citation statements)

References 34 publications

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“…Also, the biomass will block the outlet of the reactor when the fluidization quality is bad. It is widely reported in the literature that pure biomass particles are difficult to fluidize or could not be fluidized since they behave in a cohesive manner . A second inertial material, such as sand or glass beads are usually used to assist the fluidization of biomass.…”

Section: Resultsmentioning

confidence: 99%

“…Loblolly pine is the most abundant wood species in the southern United States and accounts for 83% of all woody species . It is an ideal feedstock for renewable energy production.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Biomass particles are difficult to fluidize alone because of their peculiar shapes, sizes, and densities . Thus, biomass particles are generally processed with an inert bed material to improve fluidization quality to achieve better mixing, heat transfer, and reaction rate .…”

Section: Introductionmentioning

confidence: 99%

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Comprehensive experimental investigation on biomass‐glass beads binary fluidization: A data set for CFD model validation

Gao

et al. 2019

AIChE Journal

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Fluidization behavior of biomass and glass beads binary mixtures in a bubbling fluidized bed was experimentally investigated. Mixtures containing different mass fraction of Loblolly Pine white wood and glass beads were fluidized at different fluidization velocities. The particle properties were characterized in a QICPIC that uses a dynamic image processing method to measure both particle size and sphericity. The minimum fluidization velocity was determined using the pressure drop method. An image processing method was developed to capture the dynamic expanded bed height at a very high frequency. The effect of biomass mass fraction and inlet gas velocity on mixing and segregation behavior was studied and analyzed through pressure drop measurements. Pressure drop fluctuations and expanded bed height fluctuations via fast Fourier transform were analyzed and compared. The complete and accurate experimental data reported in this study could provide a benchmark data set for various computational fluid dynamics models validation, calibration, and identification.

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Section: Resultsmentioning

confidence: 99%

“…Loblolly pine is the most abundant wood species in the southern United States and accounts for 83% of all woody species . It is an ideal feedstock for renewable energy production.…”

Section: Experimental Methodsmentioning

confidence: 99%

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Comprehensive experimental investigation on biomass‐glass beads binary fluidization: A data set for CFD model validation

Gao

et al. 2019

AIChE Journal

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“…The loblolly pine’s amenability to plantation management, high wood yields, and fast growth make it one of the most economically important forest species in the world (Lu et al, 2017). Loblolly pine is also a potential renewable feedstock for alternative energy and fuel, as well as an important source for oleoresin (Olatunde et al, 2017). Oleoresin is a viscous mixture of terpenoids stored in resin canals or blisters in the stems of conifers (Trapp & Croteau, 2001).…”

Section: Introductionmentioning

confidence: 99%

Identification, expression, and phylogenetic analyses of terpenoid biosynthesis-related genes in secondary xylem of loblolly pine (Pinus taeda L.) based on transcriptome analyses

Mao

Hao

et al. 2019

PeerJ

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Loblolly pine (Pinus taeda L.) is one of the most important species for oleoresin (a mixture of terpenoids) in South China. The high oleoresin content of loblolly pine is associated with resistance to bark beetles and other economic benefits. In this study, we conducted transcriptome analyses of loblolly pine secondary xylem to gain insight into the genes involved in terpenoid biosynthesis. A total of 372 unigenes were identified as being critical for oleoresin production, including genes for ATP-binding cassette (ABC) transporters, the cytochrome P450 (CYP) protein family, and terpenoid backbone biosynthesis enzymes. Six key genes involved in terpenoid biosynthetic pathways were selected for multiple sequence alignment, conserved motif prediction, and phylogenetic and expression profile analyses. The protein sequences of all six genes exhibited a higher degree of sequence conservation, and upstream genes were relatively more conserved than downstream genes in terpenoid biosynthetic pathways. The N-terminal regions of these sequences were less conserved than the C-terminal ends, as the N-terminals were quite diverse in both length and composition. The phylogenetic analyses revealed that most genes originated from gene duplication after species divergence, and partial genes exhibited incomplete lineage sorting. In addition, the expression profile analyses showed that all six genes exhibited high expression levels during the high-oleoresin-yielding phase.

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“…One of the common reactors used for converting biomass to fuel and products is the fluidized bed system (FBS) because of relative uniformity in rate of heat transfer between biomass particles and fluidizing gases (Oliveira et al, 2013). Biomass materials properties such as moisture content (MC), density, particle shape and particle size distribution are needed to estimate the parameters (reactor pressure drop and minimum fluidization velocity-U mf ) needed to design, size, and operate FBS systems (Olatunde et al, 2017). There has been substantial progress made in quantifying the properties of biomass feedstock (Oginni et al, 2016;Olatunde et al, 2016) but the pressure drop and minimum fluidization velocity correlations developed for nonbiomass materials are still currently used for biomass feedstocks.…”

Section: Introductionmentioning

confidence: 99%

Modified Ergun Equation for Airflow through Packed Bed of Loblolly Pine Grinds

Olatunde¹,

Fasina

2019

KONA

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Biomass grinds are typically non-spherical and are composed of particles with wide range of sizes that may vary up to 10× between the smallest and largest particle. Since fluidized bed system is often used to convert biomass into fuels, chemicals and products, the viscous and kinetic energy losses' coefficients in the Ergun equation were determined to incorporate these unique characteristics of biomass grinds. The revised Ergun's equation, validated using loblolly pine wood grinds, and data from other published work resulted in estimated Ergun's K 1 and K 2 coefficients of 201 and 2.7 respectively. In addition, the relative mean deviation between experimental and predicted pressure drop was in general better with the modified Ergun's equation when compared to the original Ergun's equation.

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Moisture effect on fluidization behavior of loblolly pine Wood grinds

Cited by 10 publications

References 34 publications

Comprehensive experimental investigation on biomass‐glass beads binary fluidization: A data set for CFD model validation

Comprehensive experimental investigation on biomass‐glass beads binary fluidization: A data set for CFD model validation

Identification, expression, and phylogenetic analyses of terpenoid biosynthesis-related genes in secondary xylem of loblolly pine (Pinus taeda L.) based on transcriptome analyses

Modified Ergun Equation for Airflow through Packed Bed of Loblolly Pine Grinds

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